Safety gas appliance.



H J. LONG.

SAFETY GAS APPLIANCE.

APPLIOATION FILED MAY 23, 1911.

U yy atented 0011281913.

nsannar J. Lone, or new newsman, newness-a earner ens Man ma.

specification of Letters itl'atezit. Application filed Ma ne, ieii. 'afieriall l'og gfififlflfi.

Patented Got. as, 1913.

To all whom it may concern Be it known that l, HERBERT J. LONG, a

citizen of the United States of America,l

and residing at New Brunswiclq'in the,

county of lvliddlesen and State ofillew Jerl sey, have invented certain new and useful,

1 improvements in Safety Gas Appliances, of I burners, serious explosions result due to the separrote parts are designated by the same which the following is a specification, such I as will enable those skilled in the-art to; which it appertains to make and use the sanie. a l

This invention relates to gas burning devices wherein a pilot light is'e nployed'in conjunction with the main gas supply, and in the present form of embodiment there of is particularly adapted for use in corn. noction with water heaters. In the forms of devices of this class now in use it has been found that the pilot light is sometimes extinguished and when the main gas supply is turned on, either manually or by auto matic means, no ignition thereof occurs withint-he heater and, when an effort is made to ignite either the pilot or the main volume of escaped gas within the casing of the heater andto the continued escape thereof from the burners, and it is to avoid any possibility of such explosion that my invention was conceived.

The object of my invention is to provide a barrier for the pilot light, such as a door or equivalent, which is in operative connection with a valve in the main gas supply pipe in such manner that when the barrier is removed to ignite the pilot, in the event of its having been extinguished, the main gas supply to the burners is shut oh, the gas which had been'permitted to escape from the burners passing upwardly and outwardly through the flue aided by the draft occasioned by the opening of the door, when a door is employed as the barrier, and by the time a match is lighted and inserted into the heater no gas remains therein, or very little, and the flow. of gas to the burners having been stopped, no explosion occurs and the pilot may be lighted with perfect safetyand, when the door 1s again closed, the safety or emergency valve referred to'again permits the passage of gas to the main burners where it is ignited 'by the pilot.

My invention is fully described in the following specification, of which the accorn panying drawings form a part, in which the ranged in coils or other desire a water heater provided with inyinve'ntioin Fig. 2 is a sectional plan view thereofl'on the line 2-2 of Fig. 1; and Fig. 3 is a section through a valve which I employ, on the line 3-3 of Fig. 1.

In the drawings forming a part of this application I have shown a preferred form ot-emb'odiment of my invention adapted for use in water-heaters, said heater comprising a'casing, a having burnersa therein which are in connection with the main gas supply pipe at, said pipe being usually provided with a valve a to control the same, said Val i re being;- either manual or automatic, or both of such valves maybe employed, and it pilot light tube a extends into the casing a fro-in a point in the pipe at beyond the valve a whereby a constant flow of gas is permitted 'therethrough, and I may ei nplo'y a valve a in the pilot light tube if desired, all of the parts just described being of old and well ltnown construction.

At i) l have shown a valve interposed between the valve a and the burners a the stem 6 of which extends upwardly a pre. determined distance and has an am: 5 secured thereto to operate the same, said arm being" provided with a slot, 5* therein through which passes a screw or bolt l5 which is held in a door a hinged at c and serving as a cover for an opening a in the casing a'arljaceht the pilot burner a, and it will be understood that the valve 72 is open when the door a is closed but, when the said door is opened, the valve 71 is closed as indicated :in dotted lines in Fig. 3 the slot 5 permitting the bolt 5 to slide therein in the movement of the door.

At at, Fig. 1, l have shown a plurality of minute openings which are merel for the purpose or being able to see if he pilot light is burning, but any suitable equivalent may be employed for this purpose, the said holes not being of suiiicient $126, to permit. the entry or a match or other flaming article, and it is thus necessary to open the door 0 before access can be had to thfe'pilot to light the sarne in the event of its not being; lighted or or its havin been satin ished in any manner.

it will be eater-aces" an an san a contains the usual water supply pipes, ar-

orm to give a large heating surface, these pipes not being shown, however, as they form no part of this invention and, from the foregoing, it will be seen that a constant flow of gas is permitted to the burners when the door 0 is closed and the valve a open, but when the door 0 is opened the supply of gas to the burners is stopped and the pilot maybe lighted without fear of explosion and, while I have shown my invention adapted for use in connection with water heaters, it will be evident that it is adapted for any gas burning device wherein a constantly burning pilot light is employed and wherein explosions are possible due to escaped or escaping gas, and it will also be evident that many changes in and modifications of the details of construction shown and described may be made to adapt my invention either to water heaters or other uses and still be within the spirit of my invention and without sacrificing the advantages thereof.

Having fully described my invention, what I claim asnew and desire to secure by Letters Patent, is v 1. In a gas burning device, a casing provided with a door, main burners therein, a

gas supply pipe for said burners, a valve in said pipe, a pilot fixed in said casing and in communication with said pipe between said valve and the source of supply whereby a constant gas supply results to said pilot, and means connected with said door and valve for closing the valve upon opening the door and thus preventing the supply of gas to said main burners when thedoor is opened.

2. In a water heater, the combination of a combustion chamber, a door therefor, a burner within the combustion chamber, a fuel supply pipe leading to the burner, a valve for said supply pipe, a pilot normally in cooperative relation with the burner and in constant communication with a source of gas supply, and means actuated by the door for closing the valve on the opening of the door to cut oil the gas supply to the burner.

3. In a-heater, the combination of a combustion chamber, a door therefor, a main burner and a pilot burner within said chamber, means for supplying fuel to said burners, a valve controlling the supply of fuel to said main burner independently of the supply of fuel to said pilot burner and means actuated by the movement of the door for closing the valve upon opening the door and 7 cutting off the su ply of gas to the main burner without a to the pilot burner.

4. In a heater, a combustion chamb r, a door therefor, a main burnerand a gilot burner in said chamber, means for supplying ectmg the supply of gas fuel to said burners, a main valve for controlling the supply of fuel to said main burner, a; valve for controlling the supply of fuel to said pilot burner independently of the supply of fuel to said main burner and means of connection between said door and said main valve for operating said main valve when said door is open without affecting the valve controlling the supply of fuel to said pilot burner.

5. In a heater, :1 combustion-chamber, a main burner in said chamber, a fuel supply pipe leading thereto, a main valve in the supply pipe to the main burner, a door for said chamber, hinges for said door independent of said valve, means of connection between said door and said valve for closing said valve upon opening said door and open ing said valve upon closing said door and means for igniting the fuel from said main burner withinsaid chamber when the door is closed.

6. In a heater, a combustion chamber, a main burner insaid chamber, a supply pipe leading thereto, a main valve in the supply pipe to the main burner, a door for said chamber, hinges for said door substantially in line with but independent. of said valve, an arm for. transmitting motion from said door to said valve to close said valve when said door is opened and adjustable means for connecting one end of said arm to one of said elements. i i

7. In a heater, a combustion chamber, a

main burner in said chamber, a supply pipe leading thereto, a main valve in the supply pipe to the main burner, a door for said chamber, hinges for said door substantially in line with but independent of said valve,

-an arm for transmitting motion from said door to said valve to close said valve when said door is opened and adjustable means-for connecting said arm to said door.

8. In a heater, a. combustion chamber, a main burner in saio. chamber, a fuel supply pipe leading thereto, a rotary valve in said supply pipe, a door for said chamber, hinges for said door substantially in line with said valve,.an arm secured to said valve and hav ing asliding connection with said door for closing said valve when said door is opened and opening said valve when said door is closed.

' In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 22nd day of May, 1911.

HERBERT J. LONG. \Vitnesses:

GEORGE F. BENTLEY, J. C. LARSEN. 

